Dynamics of the laser–powder interaction in the Ti6Al4V powder feeding process of laser-directed energy deposition additive manufacturing

Lv, Chunchi; Wang, Jiayue; Li, Hui; Yin, Qianxing; Liu, Wenjie; Shen, Shengnan

doi:10.1016/j.jmrt.2023.11.099

Cited by 4 publications

(2 citation statements)

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“…Although the additive manufacturing methods are still developing, there are seven leading powder bed technologies as per the ASTM F2792 norm, as shown in Figure 6 [35]. The power of the laser and the feed rate of the powder have a direct impact on the homogeneity of an additively manufactured structure [42]. A Gaussian moving heat source could represent the laser beam power as in Equation ( 1):…”

Section: Additive Manufacturing Methods For Ti6al4v Componentsmentioning

confidence: 99%

“…where A is the laser absorption coefficient, Plaser is the laser power, r0 is the focus radius, x0 is the laser's beginning beam location, xi is the position of laser focus and vlaser is the laser's The power of the laser and the feed rate of the powder have a direct impact on the homogeneity of an additively manufactured structure [42]. A Gaussian moving heat source could represent the laser beam power as in Equation ( 1):…”

Section: Additive Manufacturing Methods For Ti6al4v Componentsmentioning

confidence: 99%

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Effects of Shot Peening and Electropolishing Treatment on the Properties of Additively and Conventionally Manufactured Ti6Al4V Alloy: A Review

Okuniewski,

Walczak,

Szala

2024

Materials

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This literature review indicates that the basic microstructure of Ti6Al4V is bimodal, consisting of two phases, namely α + β, and it occurs after fabrication using conventional methods such as casting, plastic forming or machining processes. The fabrication of components via an additive manufacturing process significantly changes the microstructure and properties of Ti6Al4V. Due to the rapid heat exchange during heat treatment, the bimodal microstructure transforms into a lamellar microstructure, which consists of two phases: α′ + β. Despite the application of optimum printing parameters, 3D printed products exhibit typical surface defects and discontinuities, and in turn, surface finishing using shot peening is recommended. A literature review signalizes that shot peening and electropolishing processes positively impact the corrosion behavior, the mechanical properties and the condition of the surface layer of conventionally manufactured titanium alloy. On the other hand, there is a lack of studies combining shot peening and electropolishing in one hybrid process for additively manufactured titanium alloys, which could synthesize the benefits of both processes. Therefore, this review paper clarifies the effects of shot peening and electropolishing treatment on the properties of both additively and conventionally manufactured Ti6Al4V alloys and shows the effect process on the microstructure and properties of Ti6Al4V titanium alloy.

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Section: Additive Manufacturing Methods For Ti6al4v Componentsmentioning

confidence: 99%

Section: Additive Manufacturing Methods For Ti6al4v Componentsmentioning

confidence: 99%